Great preaching has
Solid scholarship…you have used whatever ability you have to get at the Bible writer’s intent.
That will look like original language study if you know them. It will look like reading in multiple contexts the chapter…book….etc… It will look like appealing to commentaries.
It also includes Understanding of the needs of your people.
That will look like having talked to them. Having struggled with them. Visited them.
It also includes Spirit leading. Has the Spirit lead you in your preparation? Has the Spirit lead you in your putting together the points? Has the spirit lead.
You want to preach on a theme. What do You Do? What Text do You Use? Brother Sherman speaks on this issue in this episode.